Pump valve



u v 3 J. c. ENDERS ZMUK PUMP VALVE Filed June 19, 1934 This invention relates-to pumps and particularlyfto those pumps in which there is a standing valveat the lower end of the pump cylinder and a valve in the piston opening upon the movement of the pist'on toward the standing valve and closinupon the reverse movementofthe piston. The genera1 object of the present invention is mprovise aflpump irr'which the piston isfnot directly and rigidly connected tothe pistonrod, but in which the valve is connected to the piston rod and 5 the piston has a "slight movement with relation-t-the-piston rod sothat upon'an initial movement of the piston rod in one direction, the 'rodwil-l move relative to the piston to open the port through the piston and upon a reverse movement of the rod, the valve carried by the *rod will' close the po-rtopening of the'piston and then-pick up the-piston and move it.

n1 Aifurther-object is to provide a construction iof thisicharacter in which the valve mechanism of thelpiston'maybe made interchangeable with the .standi ng valve thus cheapening the construc- -tion of the pump. t

.A further object of the invention is to provide a piston or plunger-"or valve that is simple in constr'uctiomefiicient in operation, has along life, may be easily replaced and has a small number of parts.

Other objects will appear in the course of the following description.

My invention is illustrated in ing drawing, wherein:-

Figure 1 is a longitudinal section through a the accompanypump cylinder showing the piston and standing valve in section;

Figure 2 is a top plan View of the guide used in connection with the valve.

Referring to the drawing, A designates any usual or ordinary pump cylinder and B and C the opposite heads of the cylinder. The head B is, of course, provided with the outlet D and the head C with the inlet E. As illustrated, the head C is provided'with a valve seat i9 resting upon a gasket I i. This seat is disposed within the bowlshaped portion l2 of the head C andis provided with the inwardly extending annular flange I3 which constitutes the seat proper of the valve.'

The standing valve is designated,v Hi and is provided with a central solid portion normally resting upon the seat l3 and provided at its margin with a plurality of passages, or apertures it.

PUMP VALVE ,Jolin C. En ders, Louis, Mo., assignor of onefourth to Monroe P. Lambert and'one-fourth v ftofieorgeBnJaycox, both of St. Louis Mo.

Application June. 19, 1934, Serial No. 731,354 roiaimfl (01. 251-427 PAT NT OFFlCE f outwardly and upwardly inclined annular flange is formed with a plurality of perforations l9.

It will be seen thatthe guide I! is movable toward or from the under facev of the seat I3 as the valve i4 moves toward or away from the seat 5 i 3. This element ll acts as a-guide for the valve and slides Within a recess 29 formed in the lower end of the sleeve element 10.

Upon the up stroke of the pist0n, the valve l4 and the guide I? rise, permitting liquid to pass upward through the apertures l9and around the valve Hi into the body of the cylinder. Upon a downward movement of the piston in the cyl-. inder, the valve I4 is closed as usual. 7 3

i The piston rod 2 i has pinned, screwed or othl5 erwise attached to it at its lower end the vvalve 22. This valve is rigid on the piston rcd and-"is disposed within a recess 23 formed inthe under face of the piston or plunger 24'. The piston 24 has a large aperture in the center designated 25 through which the piston rod 2! freely passes. The valve 22 has a portion 26 seating against a seat formed on therunder face of the piston 24 immediately surroundingthe opening and outward of-this seat 26, the valve 22 is formed with 25 apertures 21."

The upper face of the piston is recessed at 28 and disposed within this recess is the guide 29 which has the same form as the guide ILthat is, it is provided witha central hub portion and 30 an outwardly, and in this case downwardly, extending flange 39 formed with apertures 3|. This member 29 is loose upon the piston rod 2| but is retained in place within the recess 28 by means of a spring 32 surrounding the piston rod, bearing against the hub of the valve 29 and at its upper end bearing against a collar 33 pinned to the piston rod. 1 V

In the operation of this valve, upon the up- 40 stroke of the piston rod, the piston 24 will be drawn upward by its engagement with the valve 22, but upon the downward. movement of the piston rod, the piston rod with the valve 22 will move downward a predetermined amount, the valve 22 leaving its seat 26, the piston remaining stationary until the collar 33 has compressed the spring 32 sufiiciently to cause the guide 29 to move downward and carry with it the piston 24. v The first initial movement of the piston rod,

therefore, opens the valve and then a further movement depresses the piston or plunger 24. Upon the return stroke, the piston rod and the valve 22 rise, the piston remaining stationary until the valve seats against the piston and then the piston and the allied parts rise with the piston rod.

For the purpose of opening the valve E4 in order to drain the pump, as for instance, in cold weather, I have provided a lifter 34 mounted upon a shaft 35 extending transversely through the head C and provided upon its exterior end with means whereby it may be rotated. Thus the standing valve may be readily lifted.

While I have illustrated a particular form of pump cylinder with detachable heads, the heads being bolted to each other, I do not wish to be limited to this particular form of pump body as this is merely illustrative. This structure may be used for air pumps or liquid pumps. The purpose of providing the spring32 is. to secure a cushion upon the downward stroke of the piston and relieve the shock or jar which would be inci dent to the collar 33 striking the upper end of the guide 29. This spring, therefore, prevents back lash or jerk at the reverse stroke of the piston rod and acts to return the valve to its seat after downward pressure has been removed.

It will be noted also that the valve 22- is guided to its seat by its peripheral contact with the Wall of the recess 23-instead of being guided to its seat by small pins as is usual in pumps of this character. This means that inasmuch as the periphery of the valve has more metal to wear, the valve will have a longer life.

It is particularly to be noted, that the lower valve or standing valve is an exact reproduction of the plunger valve. The stem I6 may be screwthreaded into the valve head M in the same manner as the pump piston is screw-threaded into the valve head 22. The guide 29, is of the same character as guide H and these guides may be used indiiferently either upon the piston 2| or upon the valve stem l6. It will be seen that the seating element HIv is an adaptor which may be used in pumps for the purpose of permitting the useof the guide I! and of the valve H.

While I have illustrated afpump in which liquid is taken in at the lower end of the cylinder upon the upstroke of the piston and the liquid discharged from the spout D upon this lip-stroke,

yet it will be obvious that by reversing the piston 24, that is, inverting it from the position it has in Figure 1 and reversing the valve 14 and the guide l1 and, of course, reversing the valve seat, the pump will then draw in fluid through the head B and expel fluid through the head C, that is, the direction of flow of fluid through the pump is reversed so that the discharge is on the pushing stroke instead of upon the pulling stroke as shown in the drawing. This is particularly necessary in. such pumps as are used for tire pumps and in many other different circumstances.

It will thus be seen that I do not wish to be limited to the arrangement of the piston and standing valves as shown in my Figure 1 as this arrangement. may be inverted or reversed and that when inverted or reversed, the valves will operate in the same manner as described except that the valve M will open upon the down-stroke of the piston and the valve 22 will close upon the down-stroke oi the piston.

The valves which I have shown are intended as much for replacement for pumps already in use as they are for installation of. new pumps.

While I have illustrated certain details, I do not wish to be limited thereto, as it is obvious that modifications might be. made without departing from the spirit of the invention as defined in the appended claim.

I claim:--

In a pump, an element, having a central axial passage, the element being recessed on its opposed faces concentric to the axial center of the element, the inner wall of one of said recesses being formed to provide a valve seat surroundins the central passage, a valve having a sliding fit within one of said recesses and enacting with the valve seat, the valve having marginal apertures, a central stem on which the valve. is carried extending through the passage in the element, and a guide mountedon the stem and fitting within the other of said recesses and engazinz the wall thereof, the margin of the. guide beinl apertured, th uide constituting a, stop limiting the opening movement oi the valve. 7

JOHN C. ENDEBS. 

